Coarse support silica particles
The present invention relates to novel granular silicas for use as support material, especially as support for catalysts for fixed bed reactors, and to the production and use thereof.
1. Granular silica having
an Hg pore volume (<4 μm) of 0.90 ml/g to 1.30 ml/g,
a d Q3=10% of ≥428 μm with, at the same time, a d Q3=90% of 923 μm to 2448 μm, and
a ratio of the d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure of 2.10 to <4.00, the measurement being effected on a fraction of particles from 400 to 500 μm.
2. Granular silica according to claim 1 ,
wherein the granular silica has a pH in the range from 5 to 8.5.
3. Granular silica according to claim 2 ,
wherein the granular silica is a precipitated silica.
4. Granular silica according to claim 1 ,
wherein the granular silica has a ratio of the d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure off 2.10 to 3.00 with the measurement effected on a fraction of particles from 400 to 500 μm.
5. Granular silica according to claim 1 ,
wherein the granular silica has a ratio of the d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure of 2.50 to ≤4.00 with the measurement effected on a fraction of particles from 400 to 500 μm.
6. Granular silica according to claim 1 ,
wherein the granular silica has a d Q3=10% of 428 μm to 563 μm.
7. Granular silica according to claim 1 ,
wherein the granular silica has a d Q3=90% , of 923 μm to 995 μm.
8. Granular silica according to claim 1 ,
wherein the granular silica has an Hg pore volume (<4 μm) of 0.90 ml/g to 1.20 ml/g.
9. Granular silica according to claim 1 ,
wherein the granular silica has a ratio of the d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure of 2.50 to 3.00 with the measurement effected on a fraction of particles from 400 to 500 μm.
10. Granular silica according to claim 1 ,
wherein the granular silica has a ratio of the d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure of 2.60 to <4.00 with the measurement effected on a fraction of particles from 400 to 500 μm.
11. Granular silica according to claim 1 ,
wherein the granular silica has a ratio of the d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure of 2.60 to 3.00 with the measurement effected on a fraction of particles from 400 to 500 μm.
12. Granular silica having
an Hg pore volume (<4 μm) of 0.90 ml/g to 1.90 ml/g,
a d Q3=10% of 428 μm to 563 μm with, at the same time, a d Q3=90% of 923 μm to 995 μm, and
a ratio of the d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure of 2.50 to <4.00, the measurement being effected on a fraction of particles from 400 to 500 μm.
13. Granular silica according to claim 12 ,
wherein the granular silica has an Hg pore volume (<4 μm) of 1.05 ml/g to 1.20 ml/g.
14. Granular silica according to claim 12 ,
wherein the granular silica has a d Q3=10% of 428 μm to 467 μm.
15. Granular silica according to claim 12 ,
wherein the granular silica has a ratio of the d 50 without ultrasound exposure to d 50 after 3 min of ultrasound exposure of 2.60 to <4.00 with the measurement effected on a fraction of particles from 400 to 500 μm.
16. A method for producing an absorbate comprising combining the granular silicas according to claim 1 with an additional absorbate material.
17. An absorbate comprising at least one of the granular silicas according to claim 1 .
18. An absorbate according to claim 17 ,
wherein the absorbate comprise at least one catalytically active substance or active substance mixture.
19. Absorbate according to claim 18 ,
wherein the active substance or active substance mixture is applied in proportions of 1 to 20% by weight.
20. Absorbate according to claim 17 ,
wherein the absorbed substances are applied in proportions of 1 to 70% by weight.
21. A catalytic process comprising utilizing the absorbate according to claim 17 in the catalytic process.
22. Process according to claim 21 ,
wherein the process is performed in a fixed bed reactor, a fluidized bed reactor, or by suspending the absorbate in a reaction mixture.
23. Process according to claim 21 ,
wherein the absorbate comprises an enzyme as a catalyst on a granular silica, of the at least one granular silicas.